I just traded a jeep to a friend for his MG3 build where he bought an 80% complete steel receiver blank and couldn't find a way to finish machining it. I have most everything except a barrel, shroud, bolt body, and grip and stalk, most of which are already on the way. But I have no idea what the internal dimensions are supposed to be so I have no idea what tooling I need to complete this receiver. I believe it's a Robert RTG receiver, don't know for sure, gotta go get more details from my friend again. I was thinking I'd just get one of those semi auto fcg and pistol grip packages off RTG and I'd be set for Single Action but I've also read in other places the Receiver has to be milled out a certain way for Single Action also.
In deep need of guidance.